From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
Improvements to a servo system, referencing patents, road testing, and contributions from various individuals.
Identifier | ExFiles\Box 73\2\ scan0302 | |
Date | 27th March 1924 guessed | |
-2- The only possible improvement on the combined scheme that we know of is the double ratchet drive. It may not be free from the Hispano patent, but I would permit of a still slower forward running servo which would ensure more gentle application and freedom from the risk of jaggers, without increasing the stresses. It would give a servo that should not require adjusting for 50,000 miles, and might also reduce the necessity of effective direct foot pressure braking. Possibly we may test this when time permits but patents should cover it and all that is on these sheets. The servo should have so little wear that it should not require adjustment for 20,000 miles. The flat plate type might be thought best for this. I trust that the necessary modifications will be sent from WW. in a few days. All hands should help, including Mr. Elliott and Mr. Stent, and before the Easter holiday a few cars will be on the roads testing out the final schemes. We have to thank Mr. Rowledge for his help in producing the rear acting attachment which has now become so remarkably simple to apply, and Mr. Bailey for his theory of road shocks to steering gear, limiting the advantages of centre-point steering. R.{Sir Henry Royce} | ||